<template>
  <div>
    <ul>
      <li v-for="(obj,index) in arr" :key="index">{{obj}}</li>
    </ul>
    <button @click="Fn">走一走</button>
  </div>
</template>

<script>
export default {
data(){
  return {
    arr:['帅哥','美女','程序员']
  }
},
methods: {
  Fn(){
    this.arr.push(this.arr[0])
    this.arr.shift()
  }
}

}
</script>

<style>

</style>